611644441 has 4 divisors (see below), whose sum is σ = 615180132. Its totient is φ = 608108752.

The previous prime is 611644403. The next prime is 611644459. The reversal of 611644441 is 144446116.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 398601225 + 213043216 = 19965^2 + 14596^2 .

It is a cyclic number.

It is not a de Polignac number, because 611644441 - 2¹⁵ = 611611673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (611644471) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1767586 + ... + 1767931.

It is an arithmetic number, because the mean of its divisors is an integer number (153795033).

Almost surely, 2^611644441 is an apocalyptic number.

It is an amenable number.

611644441 is a deficient number, since it is larger than the sum of its proper divisors (3535691).

611644441 is a wasteful number, since it uses less digits than its factorization.

611644441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3535690.

The product of its digits is 9216, while the sum is 31.

The square root of 611644441 is about 24731.4463992707. The cubic root of 611644441 is about 848.8540224593.

The spelling of 611644441 in words is "six hundred eleven million, six hundred forty-four thousand, four hundred forty-one".